How to download Facebook on iPhone 6

iOS 12.5.7 is the latest iOS security update for iPhone 6.

iPhone 6 can’t be update to a higher iOS (13 and later). 

If you have an outdated iPhone that cannot be updated to iOS 13 or later, many apps will not be able to download.

Outdated iPhone no longer meets the requirements for many apps.

Facebook requires iOS 13.4 or later.